Alicia pushes her buggy at a constant speed of 2m/s. She sees a car pull out 8m in front of her. She slows down with a deceleration of 1m/s2. How long does it take her to stop?

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Answer:

The acceleration of cars in the United States is stated as a "zero to sixty" time, where vi is zero and vf is 60 miles per hour or 27 meters per second. The average rate of acceleration of all the ordinary cars I found was between 3 and 4 m/s2.

It takes 2 seconds for her to stop the buggy.

Given that the speed of buggy is u = 2m/s

deceleration a = 1 [tex]m/s^2[/tex]

When the buggy stops, its final speed is v = 0 m/s

Now, from the first equation motion, for decelerated motion

v = u - at  , where t is the time taken

0 = 2 - 1×t

t = 2s

Hence, it takes 2 seconds to stop the buggy.

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